hibernate复合主键:hibernate(jpa)复合主键annotation声明思路方法

on 2009-8-17 in Java教程 | 0 Comment
　CREATE TABLE TB_HOUR_DATA(STAT_DATEDATE NOTNULL,PATH_IDNUMBER(20)NOT NULL,VALUEVARCHAR2(512 BYTE),TYPENUMBER(1)NOT NULL)

　　其中复合主键为(STAT_DATEPATH_IDTYPE)

　　针对这种情况hibernate(jpa) annotation 映射声明如下:

　　1、复合主键类HourDataPK

　　package net.kong.wolf.stat.db.entity;

　　import java.io.Serializable;import java.util.Date;

　　importjavax.persistence.Column;importjavax.persistence.ddable;importjavax.persistence.JoinColumn;importjavax.persistence.ManyToOne;importjavax.persistence.Temporal;importjavax.persistence.TemporalType;

　　@ddablepublic HourDataPK implements Serializable

　　/** *//*** */private final long serialVersionUID = 1L;

　　@ManyToOne@JoinColumn(name = "path_id", nullable =false)privatePath path;

　　@Column(name ="stat_date")@Temporal(TemporalType.DATE)privateDate statDate;

　　private type;

　　public Path getPath path;

　　public void Path(Path path) this.path = path;

　　public Date getStatDate statDate;

　　public void StatDate(Date statDate) this.statDate=statDate;

　　public getType type;

　　public void Type( type) this.type = type;

　　2、实体类HourData: package net.kong.wolf.stat.db.entity;

　　import java.io.Serializable;

　　importjavax.persistence.ddedId;importjavax.persistence.Entity;importjavax.persistence.Table;

　　import net.kong.wolf.stat.core.Text;

　　@Entity@Table(name = "TB_HOUR_DATA")public HourDataimplements Serializable

　　/** *//*** */private final long serialVersionUID = 1L;

　　@ddedIdprivate HourDataPK pk;

　　private String value;

　　public String getValue value;

　　public getHours parseValue(value);

　　private parseValue(String value) result = [24];for( i = 0; i < 24; i) result[i] = -1; (valuenull) result;String hs = Text.splitCSV(value); len =Math.min(24,hs.length);for ( i = 0; i < len; i) result[i]=Text.parseInt(hs[i], -1); result;

　　public HourDataPK getPk pk;

　　public void Pk(HourDataPK pk) this.pk = pk;

Tags:  hibernate主键 hibernatejpa annotation主键 hibernate复合主键

延伸阅读

最新评论

发表评论